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The flight crew attempted to intercept the ILS GS from above. The aircraft rode high on the GS. At 500 ft the reporter disengaged the autoplt. The aircraft was previously trimmed nose down by the autoplt so the aircraft went below the GS to within 200 ft of the ground.
| Attributes | |
| ACN | 334892 |
| Time | |
| Date | 199604 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : foe |
| State Reference | KS |
| Altitude | agl bound lower : 200 agl bound upper : 500 |
| Aircraft 1 | |
| Controlling Facilities | tracon : foe tower : sun |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | other : unknown |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 20000 flight time type : 850 |
| ASRS Report | 334892 |
| Person 2 | |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | non adherence : published procedure other anomaly other other spatial deviation |
| Independent Detector | other flight crewa |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | other |
Narrative:
While approaching foe for the ILS runway 31 the plane intercepted above the GS. The autoplt captured and started nose down trim to intercept. At approximately 500 ft AGL, still above the GS, I disengaged the autoplt and the aircraft nosed down abruptly. Recovery was initiated immediately but the plane descended below the GS. I estimate the lowest descent was 200-300 ft AGL. The airport was straight ahead. A missed approach was made and we proceeded to kansas city downtown airport. This was caused by attempting to intercept the GS from above.
Original NASA ASRS Text
Title: THE FLC ATTEMPTED TO INTERCEPT THE ILS GS FROM ABOVE. THE ACFT RODE HIGH ON THE GS. AT 500 FT THE RPTR DISENGAGED THE AUTOPLT. THE ACFT WAS PREVIOUSLY TRIMMED NOSE DOWN BY THE AUTOPLT SO THE ACFT WENT BELOW THE GS TO WITHIN 200 FT OF THE GND.
Narrative: WHILE APCHING FOE FOR THE ILS RWY 31 THE PLANE INTERCEPTED ABOVE THE GS. THE AUTOPLT CAPTURED AND STARTED NOSE DOWN TRIM TO INTERCEPT. AT APPROX 500 FT AGL, STILL ABOVE THE GS, I DISENGAGED THE AUTOPLT AND THE ACFT NOSED DOWN ABRUPTLY. RECOVERY WAS INITIATED IMMEDIATELY BUT THE PLANE DSNDED BELOW THE GS. I ESTIMATE THE LOWEST DSCNT WAS 200-300 FT AGL. THE ARPT WAS STRAIGHT AHEAD. A MISSED APCH WAS MADE AND WE PROCEEDED TO KANSAS CITY DOWNTOWN ARPT. THIS WAS CAUSED BY ATTEMPTING TO INTERCEPT THE GS FROM ABOVE.
Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.